Combination-engine



A. w.' BODELL.

COMBINATION ENGINE.

APPLICATION FILED AUG.I5, I9I9.

2 SHEETSSHEET 1.

I I v f r [71 vemor LE WBODELL A. W. BODELL.

COMBINATION ENGINE.

APPLICATION FILED AUG.I5.1919.

1,333,749. Patented Mar. 16, 1920.

2 5H ETSSHEET 2.

A TTORNE Y nniinivlw. BoDELL, or wrmanrrn, rLLIivoIs.

COMBINATION-ENGINE.

masses.

sw i Letters Patent {Patented Mar. 10, 1920.

Application filed August 15, 1919. Serial 1V0. 317,799.

To all iuiiom'it may concern:

Be it known that I, ALLEN V. BoDELL,"

a citizen of the United States, residing at Vilmctte, in the county of Coo andState of Illinois, have. invented a new and useful improvement in Combination-Engines, of which the following is a specification.

My invention relates to an improved form of combination engine in which a- 1'0.

tor and one or more reciprocating pistons are operated sin'iultaneously by the action oi' the same gases under pressure. More specifically my invention consists of providing an engine ofthis kind with a single, mechanism for controlling the operation of the rotor which is acted upon successively by the gases under pressure operating the, several pistons of the reciprocatory portion of the engine. shown and described as embodied in an .internal combustion engine, it will be unden stood that the same mode of operation may be employed where the-motive power is any gas under pressure, by properly designing.

the engine for the particular motive power used.

Fig. lis a right hand end view of the parts shown in Fig. 2,

F 5 is a view of the parts shown in Fig. T taken along the line 55,

Fig. 6. is a sectional view of the parts shown in Fig. 3, taken along the linc 6-6, Fig. 7, is top view of the dogs shown in Fig. 6, c i

Fig. 8, is a sectional view of the parts shown in Fig. 7, taken along the line 8S, and

ing devices.

Similar numerals refer to similar parts throughout the several views.

As shown in Figs. 1 and '2, my engine con sists of. a casing 10, within which a rotor 11, rigidly secured to a shaft 12, is mounted.

: displaced a half rotation of the shaft 12 for I a purpose to be described.

While my invention is My invention will best be understood by Fig. 9 is a detail view of the casing clamp- Secured to the ends of the casing10 and projecting upwardly therefrom are cylinders and lt containing pistons; and 16 respectively. The pistons 15 andlG are connected by piston rods 17 and 18 with 0Q cross-heads 19 and 20 supported on slides 21'and 22, said cross-heads being pivotally connected respectively with the upper ends of the connecting rods 23'and' 24 which engage at their lower ends the cranks 25. and 6; 26carried by the shat-i312. Said cranks are oppositely disposed, so that the cycles or operation of the pistons 15 and 16 may be 1 The cylinder 13 is provided with an intake port 2'7, and an exhaust valve28. The shaft 12 has secured thereto a pinion 29 meshing with a gear 30 secured to a cam shaft 31, said pinion being of half the diameter of 7 said gear to drive said cam shaft half as fast as the shaft 12. ,The shaft 31,has secured thereto cams 32 and 33 for operating the exhaust valves 28 and 34: of the cylinders 13 and lt respectively. As shown in Fig. 5, the valve 34 is connected to one end of a bell-crank lever 35, pivotally mountedat 36 on astud projecting from the casing 10. The other end of said lever carries a roller 37 engaging thesurface of thecam 33 as a result of which the valve 34: is opcned during alternate down strokes of the piston 16. The cam 33 has projecting therefrom a pin 88 for engaginga contact spring 39 to move it into engagement with a second contact 90 spring 40 at substantially the beginning of alternate upstrokes of the piston 16, these contact springs being connected by conductors as ndicated in the ignition c rcuit lead mg to the spark plug 4:1, as a result of which i the charges are fired in the cylinderH at the proper time. Similar mechanism to that shown in F provided for opoi'atiiig the exhai.. valve 28 and controlling the firing ot the charges in the cylinder 18 from the cam the only diiierence being that the cam 32 displaced 90 degrees angular-1y from the cam 33 on the shaft 31 as a result of which the cycle or". operation of the cylinder 13 displaced a half rotationJot the shaft 12 front the cycle of operation of the cylinder 14-. H

As shown in Al, the cylinder 1 has extending outwardly from its lower end,

which in turn is connected by a pipe 46' with a suitable source of fuel not shown, as for example a carbureter. A similar con struction is provided for supplying fuel to the intake port 27 of the cylinder 13.

As shown in 2 and 3, the roto 11, which is cylindrical in form and closely fits the cylindrical bore of the casing lu, is provided with oppositely disposed annular recesses i7 and 4:8, into each of which the dogs 49 and 49 drop when it is rotated into the upper part of the casing 10. As shown in Fig. 2, the recess is provided with right hand and left hand end flanges 50 and 51 and the recess 18 is provided with similar right hand and left hand end flanges and 53, the dogs 4.9, 49 being made of a C0111: bined width to fit closely against the inner surfaces of said flanges. The lower end of the cylinder 13 is provided with a downwardly extending passageway 5i terminating in an intake port through the upper portion of the left hand end wall of the casing 10, which port opens against the outer surface of the one of the left hand flanges 51 and 53which happens to be uppermost. The cylinder 11 is provided with a similar passageway 56 terminating in an intake port-57 which opens against the outer surface of the one of the right hand flanges 50 and 52 which happens to be uppermost.

The leading portion of the flange 51, for the direction of rotation of the rotor indicated in Fig. 3. has formed therethrough one or more intake ports 58 and the trailing portion of said flange has formed therethrough a scavenging port Each of the ports 58 is a size to be somewhat more than completely covered by the edge of the ad jacent dog i9. The port in the casing is disposed in advance of the free end of the (10g 49 and registers with the ports 53 as they pass it, and the firing in the cylinder 13 is timed to occur just after the port registers with the first one of the ports 58. As a result, the fuel mixture compressed in the cylinder 13 by a down stroke of the piston 15 is admitted to the recess +1? between its leading end and the dogs 49 and 49 and the firing which innnedia-tely follows moves the piston 15 upward and turns the rotor 11 in the direction indicated by the arrow. An exhaust port 60 is formed through the end wall of the casing 10 in a position to register with the first one of th ports 58 at the end of the power stroke and this together with the opening of the exhaust valve 28 dissipates the pressure on the spent gases in both the recess 47 and the cylinder 13. A scavenging port 61 is formed through the end wall of the casing 10 to register with the port 59 soon as the dogs 1-9 and e9 a ain enter the recess at? and said port 61 is in the form of a curved slot extending upward and terminating at an angular position just behind the dog e9. This results in sweeping the spent gases from the recess 17 as it rotates under the dogs i9. -l-9 The flange 52 of the recess 18 is provided avith intake and scavenging ports and the end wall of the casing 10 adjacent to said flange is provided with intake, exhaust, and scavenging ports similar to those above described and performing the same functions for the cylinder 14 and recess 48.

As more clearlyshown in Figs. 6,7, and 8, the dogs 19, 49 are mounted on a round rod 62- in a clearance compartment projecting upwardly from the casing 10. Said dogs are secured to said rod by pins 6% 65 rigidly carried by said rod and passing through clearance slots (56 and GT in said dogs which permit a slight movement longitudinally of said dogs on said rod. The inner edge of the dog *9 has formed thereon a tongue 68 ext riding from the rod 62 to the free end of said dog which enters with a sliding fit, a groove 69 formed in the adjacent edge of the dog 9 The rear portions of the dogs d9, l9 are cylindrical and, as indicated in Fig. 3, closely fit the casing at said portions. The adjacent ends of said cylindrical portions are dove-tailed together with a' sliding fit as indicated at T0 in Fig. 6. The dogs are held in slightly separated relation to bring their outer edges into engagement with the inner surface of the compartment 63 and of the rotor flanges, by a pointed set screw 71 extending through the top of id compartment, the point of said screw resting between the adjacent edges of said cylindrical portions, but not tightly enough to prevent said dogs turning to enter and leave the recesses in the rotor.

The rod 62 has collars T2 secured adjustably by set screws to its ends for engaging the outer ends of springs 73 encircling said rod 62 andhaving their inner ends in engagement with lugs 7% projecting outwardly from the casing 10. Said springs serve to hold said dogs in working position and to move the same quickly to said position as rotation of the rotor brings said recesses successively under said dogs. Said tongue and groove and dove-tail construction serve to prevent leakage of the gases under pressure between said dogs.

It will be observed by reference to Fig. that the rotor recess that is operative during a power stroke of either piston, is in the upper right hand part of the casing 10 as viewed in Fig. 3, and that, therefore it is important that the adjacent engaging surfaces of the rotor and casing shall fit as closely as possible without undue friction.

' the nicety of adjustment required, I place bearing blocks on the shattlQ, one adjacent each end of the casing, 10, held in place by adjusting screws 7 6 extending in the de sired lines or" thrust, through arms 77 pro-' jecting from and rigidly secured to the fcas ing, as shown in Fig. 5. v i

The engine above described is of thefour stroke or four cycle type; that is to say a complete cycle of operation or the cylinder 13 for example consists of first an upstroke drawing in a fuel charge, second, a downstroke compressing said charge, third an upstroke during the firing of said charge and fourth, a downstroke exhausting the gases of combustion. .The timing is such that during the same interval, the correspondingsteps of the cycle of operation of the cylinder 1% are-first exhaust, second intake, third compression and fourth firing. In other words the cycles of operation 01": the two cylinders 13 andlec are displaced from each other a half rotation of the shaft 12.

To provide a good fit between the rotor 11 and the casing 10, I find it desirable to split the casing on the side opposite to the working position of the recesses a7 and d8.

During the construction of the casing, the split portions are held apart somewhat by suitable means during the boring of said casing, as a result of which the spring of the casing tends to more its cylindrical inner surface tightly against the rotor. To prevent too tight :1 fit in operation, "the split parts are held apart by a shouldered screw 78 as indicated'in Fig. 9, which screw provides by its adjustment a means for permitting the parts to come together asthe surfaces of the casing and rotor wear away. A i am nut 79 holds the screw/78 in any desired adjustment. The screw 78 is in threaded en 'agement with a lug 80 projecting from the casing on one side of the split in the casing and its shouldered end exerts thrust on the inner surface ota lug 81 projecting outwardly from the easing on the other side of the split. From the shouldered portion or" the screw 78 a threaded portion 82 of smaller diameter extends through a clearance hole in the lug 81, which is clamped against said shoulder by nut on the portion 82. The casing is preferably proydded with a water acket 83, operated in a manner usual with such devices, for preventing overheating of the ro tary portion of the engine. The ylind rs 13 and 1% may be similarly cooled it' desired.

While I have shown my invention inthe particular embodiment above described, it'

will be understood that I do not limit myself to this exact construction as I may employ equivalents known tothe art at the time of the filing of this application without departing from the scope ofthe appended claims. 1 i o What I claim is:

1. Inan engine, the combination of a re,

ciprocating portion and a rotary portion,

said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotorhaving power recesses and rotatably mounted in said casing,

a movable partition carried by saidcasing' for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing. extending from said cylinders to said rotor, and means for alternately establishing communication between said passageways andQsaid recesses in front of said partition asthey are engaged thereby,

2. In an engine, the combinationof a re-' ciprocating portion and a rotaryportion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said C215". ing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing extending from said cylinders to-said rotor, said cylinders being adjacent opposite ends of said rotor on the same side ofsaid' crank shaft, and flanges on said rotorat the ends of said recesses,"

said flanges having intake ports therethrough in alternate arrangement for alternately establishing communication (between said passageways and said recesses in frontof said partition asthey areengaged thereby. p i

3. Inan engine, the combination of a reciprocating portion and a rotary portion,

said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partitionicarried by said casing for successively, entering said recesses to form a non-rotary wall thereof, passageways in said casing extending from said cylin;

ciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said ends preventing leakage between them and,

permitting motion of said dogs toward and from each other, and means for holding said dogs away from each other to closely engage said casing and rotor at their outer ends.

5. In an engine, the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing se cured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing extending from said cylinders to said rotor, said cylinders being adjacent opposite ends of said rotor on the same side of said crank shaft, flanges on said rotor at the ends of said recesses, said flanges having intake ports there through in alternate arrangement for alternately establishing con'nnunication between said passageways and said recesses in front of said partition as they are engaged thereby, said partition comprising two dogs, a rod secured to said dogs and projecting throughsaid casing, and a spring between said rod and casing tending to move said dogs into said recesses.

G. In an engine. the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders. a piston in each cylinder, and a crank shaft connected with said pistons. said rotary portion compr sing a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing extending from said cylinders to said rotor, said cylinders being adjacent opposite ends of said'rotor on the same side of said crank shaft, flanges on said rotor at the ends of said recesses, said flanges having intake ports therethrough in alternate arrangement for alternately stablishing communication between said passageways and said recesses in front of said partition as they are engaged thereby, said partition comprising two dogs, a rod secured to said dogs and projecting through said casing, a spring between said rod and casing tending to move said dogs into said recesses, said dogs having interlocking portions on their adjacent ends preventing leakage between them and permitting motion of said dogs toward and from each other, and means for holding said dogs away from each other to closely engage said casing and rotor at their outer ends.

7. In an engine, the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing extending from said cylinders to said rotor, means for alternately establishing communication between said passageways and said recesses in front of said. partition as they are engaged thereby, said casing being split on one side, and devices for holding said split portion in desired position to secure a sliding fit of said rotor in said casing.

8. In an engine, the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in' each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing se cured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof. passageways in said casing extending from said cylinders to said rotor, means for alternately establishing communication between said passageways and said recesses in front of' said partition as they are engaged there by, said rotor being secured t9 said crank shaft, bearings for said shaft carried by and movable relatively to said casing, and devices for moving and holding said bearings to secure a close fit between the operating portions of said rotor and casing.

9. In an engine, the combination of a re ciprocating portion and a rotary portion, said reciprocating portion comprising two ing, a movable partition carried by said casing for successively enteringsaid recesses to form a non-rotary wall thereof, passageways in said casing extendingfroni said cylinders to said rotor, said cy, ndors being adjacent opposite ends of said rotoron the same side of said crank shaft, flanges on said rotor at the ends of said recesses, said flanges having intakeports therethrough in alternate arrangement for alternately establishing con'nnunication between said passageways and said recesses in front of said partition as they are engaged thereby, said casing being split on one side,-an d devices for holding said split portion in desired position to secure a slidingfit of said rotor in said casing. I p l 10. In an engine, the COHlblilEllllOlI'Of a reciprocating portion and a rotary portion, said reciprocating portion con'iprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing extending from said cylinders to said rotor, said cylinders being adjacent opposite ends of said rotor on the same side of said crank shaft, flanges on said rotor at the ends of said recesses, said flanges having intake ports therethrough in alternate arrangement for alternately establishing communication between said passageways and reciprocatingportion and a rotary portion,

said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons said rotary portion coi'nprising a casing secured to said cylinders, a rotor" having power recesses and rotatably mounted in said casing, a movable partition carriedby said casing for successively entering said recesses to form a non-rotary wall-thereof, passageways insaid casing extending froinfisaid' cylinders to said rotorfineans for alternately establishing coininunication between said passageways and said' recesses in front of said partition as they are engaged therea rotor having power reby, said partition comprising two dogs, a rod secured to said dogs and projecting through said casing, a spring between said rod and easing tending to move said dogs into said recesses, said casing being split on one side, and devices for holding said split portion'in desired position vto secure a slid-o ingfit of said rotor in said casin nt 12; In an engine,the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, rotor having power re eesses and rotatablyinounted in'said casing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, passageways in said casing extending froi'nsaid cylinders to said rotor, ineansfor alternately establishing communication, between said passageways and said recesses in frontof saidpartition as they are engaged thereby, said partition comprising two dogs, a rod secured to said "dogs and pr ecting through said casing, a spring between said rod and recesses, said rotor being secured'to said crank shaft, bearings for said shaft carried and devices for nioving and holding said bearings to secure a close fit between the op crat ng portions of said rotor and casing.

13. In an engine, the combination of a reciprocating portion and a rotary portion,

said reciprocating portion comprising two cylinders, a piston in each cylinder, and a crank shaft connected with said pistons,

said rotor, said cylinders being adjacent opposite encs of said 1 rotor on the same side of crankshaft, flanges on said rotor at the ends of said recesses,

said I flanges having intake ports there- 'through in alternate arrangement for a1- ternatoly establls'hing' communication between said oassagewa S and saidrrecesses in front of said partition as they are engaged thereby, said casing being split on one side, devices for holding said split portion 111 desired aosition to secure a slidin fit of said rotor in said casing said rotor being secured to said crank shaft, bearings for said shaft owned by andinovable relatively to sa d casing, anddevices for moving and holding 93s to secure a close fit between said bet, the operating portions said rotor and casin :l 'cesin extending from ll. In an engine, the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and a rank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power re cesses and rotatably mounted in'said casing, a movable partition carried by said casing for succesixely entering said recesses to form a non-rotary wall thereof, passage ways in said casing emending from said cylinders to sai-u rotor, n'ieans for alternately establishing connnunication between said passageways and aid recesses in front ofsaid partition they are engaged thereby, said partition coni n'ising-two dogs, arod secured to said dogs and projecting through said casing, a spring between said rod and easing tending to more said dogs into said recesses, said casing being split on one side, devices for holding said split p01- tionin desired position to secure a. sliding fit of said rotor in said casing, said rotor being secured to said crank shaft, bearings for said atrried by and movable relatively to said casing, and devices for moving and holding said bearings to secure a close fit between the operating portions of said rotor and casing.

15. In an engine, the combination of a reciprocating portion and a rotary portion, said reciprocating portion comprising two cylinders, a piston in each cylinder, and crank shaft connected with said pistons, said rotary portion comprising a casing secured to said cylinders, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing i'or successively ent in, said recesses to form a non-rotary wall thereof, means for alternately subjecting said pistons to gas under pres ure,and me ns for communicating the under pr re alternately to said recesses in front of said partition.

16. In an engine, the con'ibination of a casing, a rotor 11 ring power recesses and rotatably mounted in said casing, a inorable partition carried by said casing for successively entering s to form non-rotary wall thereon 0 sources of under pressure. and means for alternately connecting said sources with said recesses in front of said partition.

117. in an engine, the combination of a casing, a. rotor haying power recesses and rotatably mounted in said asing, a movable partition carri d by said casingfor successively entering said recesses to form a non-rotary wall thereof, said casing haying intake ports in its ends, and flanges on said rotor at the ends of said recesses, aid flanges having ports therethrough in al ternatc arrangement for alternately, est-abllshing cominunication between said intake ports and said recesses in front of said partition.

18. In an engine, the combination of a cas ing, a rotor having power recesses and rotatably mounted in said casing, a inorable partition carried b J said casing for successively entering said recesses to form a non-rotary wall thereof, means for communicating gas under pressure successively to said recesses in front of said partition, said partition comprising two dogs, a rod secured to said dogs and projecting through said casing, and a spring between said rod and casing tending to more said dogs into said recesses.

19. In an engine, the combination of a :asing, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casing for succeesively entering said recesses to form a nonrotary wall thereof, means for communicating gas under pressure successively to said recesses in front of said partition, said partition comprising two dogs, a rod secured to said dogs and projecting through said casing, a spring between said rod and ca 'ing tending to more said dogs into said recess s,

said dogs having interlocking portions on their adjacent ends preventing leakage between them and permitting motion of said dogs toward and from each other, anc means for holding said dogs away from each other to closely engage said casing and rotor at their uter ends.

20. :In an engine, theconibination of a casing, a rotor having power recesses and rotatably mounted in said casing, ainovable partition carried by said casing "for successi entering said recesses to form a norm-(nary wall thereof, said casing haying intake ports in its ends, flanges on said rotor at the ends of said recesses, said flanges having poi-ls therethrough in alternate varrangenient 'lor alternately establishing communication be tween said intake ports and said recesses in front of said partition, said partition comprising two, ogs, a rod secured to said dogs and projecti g through said casing, and a spring between said rod and easing tending to more said dogs into said recesses.

21. Inan engine, the combination of a casing, a rotor having power recesses and rotatably mounted in said casing, a movable partition carried by said casin for succossirelv u i h entering said recesses to form a non-rotary wall thereof, said casing ha ing intake ports in its ends, flanges on said rotor at the ends ofsaid recesses, said flanges haying ports therethrough in alternate arrangenient for alternately establishing communication between sald intake ports and said ecesses 11 1 front of said part tion, said partition Conn.

prising two dogs a rod secured to said dogs and projecting through said casing, a spring between said rod and casing tending to'niove said dogs into said recesses, said dogs having interlocking portions on their acent ends preventing leakage between them and permitting motion 0t said dogs toward and from each other, and means for holding said dogs away from each other to closely engage said casing and rotor at theirouter ends.

22. In an engine, the combination of a casing, a rotor having power'recesses and rotatably mounted in said casing, a movable pariition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, two sources of gas under pressure, and means for alternatelyconnecting said sources with said recesses .in front of said partition, said casing being split on one side, and devices for holding said split portion in desired position to secure a slid ing fit of said rotor in said casing.

23. In an engine, the combination of a cas mg, a rotor having power recesses and rota tably mounted in said casing, a movable m tition carried by said casing for successively]- entering said recesses to form a non-rotary wall thereof, two sources of gas under pressure, and means for alternately connecting said sources with said recesses in front of said partition, said rotor being secured-to a shaft, bearings for said shaft carriedby,

and lovable relatively to said casing, and devices for moving and holding said bearings to secure a close fit between the operating portions of said rotor and casing.

24. In an engine, the combination of a casing, a rotor having power recesses and rotatably mounted in saidcasing, a movable partition carried by said casing for successively entering said recesses to form a non-rotary wall thereof, said casing having intake ports in its ends, flanges on said rotor at the ends of said recesses, said flanges having ports,

therethrough in alternate arrangement for alternately establishing communlcatlon between said intake ports and said recesses in front of said partitlon said casing belng' split on one side, and devices for holding said split portion in desired position to secure a sliding fit of said rotor in said casing.

25. In an engine, the combination ofa casing, a rotor having powerlrecesses and rotatably mounted in said casing, a movable partition carried by said casing for successively entering said recesses to form anonrotary wall thereof said casing having in take ports in its ends, flanges on said rotor at the ends of said recesses, said flanges haV-' ing ports therethrough 1n alternate arrangement for alternately establishing communif cation between said intake ports and SELlCl' recesses in front of said partition, said rotor being secured to a shaft, bearings for said shaft carried by and'movablc relatively to" said 'casmg, and dev ces for moving and holdin saidbearin s to secure a close 'fit b V b between the operating portions or saidrotor and casing. I, y I c V 26. 111 an engine, the combination of a casing, a rotor iaving powerrecesses. and rotatably mounted in said casing, a movable partition carried by'said' casing for successively enteringsaid recesses to form anonrotary wall thereof, means for communicating under pressure successively to said recesses in front of said partition, said partitionconiprising two dogs, a rod secured to said dogs and projecting through said casing, a spring between said rod and casingtending to move said dogs into said recesses,-said casing being split on one side,

i and devices for holding said split portion in desired position to secure a slidmg fit of said rotor insaid casing.

27. In an engine, the combination of a casing, a rotor having power recessesand rotatably mounted in said casing, a movable partition-carried by, said casing for successsively entering said recessesto form anonrotary wall thereof, means for communicatmg gas under pressure successivelyv to said recesses in front of said partition, said partition comprising two dogs, a rod secured to said dogsaud projecting through said casing, a spring between said rod and casing tending to move said dogs into said recesses, said rotor being secured to a shaft, bearings forfsaid shaft carriedby and movable relaat the ends'of said recesses, said flanges havf mg ports therethrough in alternate arrangement for alternately establishing communication between said intake ports and said recesses in front of said partitlon, said oasingbcing split on one side, devices. for hold:

ing saidsplit portion in desired positionto secure a sliding fit ofsaid rotor in said cassaid rotor being secured to a shaft, bearmgs'for said shaft carried by and movable relatively to said casing, and devices for moving and holding said bearings to secure a close fit between the operating por tions of said rotorand casing.

r 29,111 enginmthe combination of a casing, a rotor having power recesses rotatably mounted in said casing, a movable partition carried b v said casing for successively entering said recesses to form a nonrotary wall thereof, means for communieat ing gas under pressure successively to said recesses in front of said partition, said partition comprising two dogs, a rod secured to said dogs and projecting through said casing, a spring between said rod and easing tending to move said dogs into said recesses, said casing being split on one side, devices for holding said split portion in desired position to secure a sliding fit of said rotor in said casing, said rotor being secured to a shaft, bearings for said shaft carried by and movable relatively to said casing, and devices for moving and holding said bearings to secure a close fit between the operating portions of said rotor and easing.

In witness whereof I hereunto subscribe inynanie this 11th day of August, A. D. 1919.

ALLEN \V. BODELL. 

